Feder,Gershon Lau,lawrence J SlaDe,Roger H Impact of agricultural extension Case study of the training and visit system in Haryana, India / Gershon feder, lawrence J.Laua and Roger H.Slade - Washington,D.C World Bank 1985 - 95p. - World Bank staff working papers . Subjects--Topical Terms: AgricultureAgriculture Haryana - India